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Operation assistance apparatus at time of accident in plant

a technology of operation assistance and equipment, which is applied in the direction of information technology support system, instrumentation, testing/monitoring control system, etc., can solve the problem of large burden on the operator

Inactive Publication Date: 2019-03-05
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

Provides operators with a calculated margin time for executing actions during plant accidents, enabling informed decision-making on resource allocation and timing.

Problems solved by technology

Therefore, in this state, burden to the operator becomes very large.

Method used

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  • Operation assistance apparatus at time of accident in plant
  • Operation assistance apparatus at time of accident in plant
  • Operation assistance apparatus at time of accident in plant

Examples

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embodiment 1

[0020]FIG. 1 is an example of a configuration of an operation assistance apparatus at the time of an accident in a plant.

[0021]A sensor 1 is a sensor that measures a temperature, a pressure, a water level, a water flow, and radiation of the plant.

[0022]A sensor signal input device 2 is a device that inputs a measurement values (sensor signal) measured by the sensor 1 to a computer. For example, a process computer may be used as the sensor signal input device.

[0023]Examples of the sensor signals are illustrated in FIG. 2. In the present embodiment, a main steam flow rate, temperature in a containment vessel, a pressure in the containment vessel, an amount of radiation in the containment vessel are exemplified as the sensor signal for the description. In addition, it is assumed that the accident occurring time is 00:00.

[0024]To an accident event estimation device 3, the sensor signal is input from the sensor signal input device 2, and the device estimates an accident event using each ...

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Abstract

An operator of a nuclear plant is provided with an action margin time up to the execution of a next action to be performed in response to a detected accident based on sensor signals received from sensors for the plant. The operator is provided with a displayed graph showing the received sensor signals, estimated sensor signals for the future, the action margin time and an action threshold value corresponding to the next action. Accordingly, the operator can readily grasp how much time is available to perform the next action before the received sensor signals are predicted to exceed the action threshold value.

Description

TECHNICAL FIELD[0001]The present invention relates to an operation assistance apparatus at a time of an accident in a plant.BACKGROUND ART[0002]In a case where an accident occurs in a nuclear power plant, an operator performs an operation action based on an action procedure manual for an accident. At this time, it is important to estimate an accident event occurred in the plant based on sensor values or the like and ascertain a state of the plant. However, at the time of the accident, many alarms are working and there are many sensor values to be checked. Therefore, in this state, burden to the operator becomes very large. In this regard, computerization of the procedure manual and a method for automatically providing the relating parameter has been studied as a method for assisting the operator. Specifically, it is considered that diagnosing the state of the plant, providing procedures to be acted by the operator, and estimating the subsequent state of the plant is effective.[0003]...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G05B13/02G05B23/02
CPCG05B23/0278Y04S10/522Y04S10/52
Inventor KANADA, MASAKIARITA, SETSUOISHII, YOSHIHIKOKATONO, KENICHIISHIKAWA, TADAAKIKAMOSHIDA, RYOTA
Owner HITACHI LTD